Puukko, WalnutA puukko is a small traditional Finnish general purpose belt knife with a single curved cutting edge. General purpose knives of this type have been used in Scandinavia since the Viking Age, and are still widely in use. The knife has a handforged, sharpened carbon steel blade with Grimfrost in runes. The handle is made from walnut wood. Material: Handforged carbon steel Handle from walnut wood Overall length: approx. 8. 2" 21 cm Blade length: approx.